I doubt he will bring up his Autism or use "Jerkop", but I do imagine there will be lots of panicked stammering, cries of "No!", and things like that. Chris does not handle emotionally charged highly stressful situations well. See: "Hedgehog Defenseive Position". I don't imagine he will be very articulate or coherent when it happens. It might just overwhelm his little tard noodle and he might try to assault the deputies.
The one thing I almost feel sorry for Chris on is the fact that Barb completely fucked him over by putting 14BC on a reverse mortgage so she could buy more worthless Goodwill shit. By doing that she guaranteed her son will lose the house he grew up in and be homeless once the bank forecloses on it. Of course, instead of planning for his future and doing what he can to try to keep the house, Chris has instead done everything within his power to disregard the inevitable and has squandered every last available dollar on video games, kiddie toys, and pony shit. He's going to be really upset when he discovers he won't be able to bring it all in the van he'll be living in.
I don't remember him crying in a classroom. The way I recall it happening was he shuffled up to the podium, took his diploma without making eye contact or shaking hands with the principal, then bolted off the stage crying, either to his parents or out into the hall. Either way, it really made poor old Bob feel deeply embarrassed and ashamed of his son's childish behavior.